South Wales Fire and Rescue Service received 11 flood-related calls during a 45-minute period on Monday afternoon.

A number of roads were cut off by flood water in Rhondda and Bridgend area, while the A465 Heads of the Valleys road was said to be just passable at Rhymney interchange and Tredegar roundabout.

Hernston Lane in Bridgend was closed in both directions between Ewenny Road and the A48 bypass road.

Homes in Penrhiwfer Road in Llwynypia, Rhondda, were hit by a sudden surge of water as were properties in Llanharan, between Bridgend and Cardiff.

Mid and West Wales Fire and Rescue Service said 10 properties had been hit by flash floods in Aberavon near Port Talbot.

Image caption
Flash flooding in Nolton Street in Bridgend

Fire officers said the drainage system was unable to cope with the amount of rain that had fallen but water had only entered one home so far.

Welsh Water also said it had attended flooding in Dunraven Street and Olive Street in the area.

A spokesperson said: "We are working closely with other organisations, including the fire brigade and Natural Resources Wales, to alleviate the flooding and minimise further risk to property.

"This incident followed a period of exceptional rainfall within a short period of time which has overloaded the sewer network.

"The extreme rainfall experienced in a number of parts of Wales during the past 24 hours has placed considerable additional strain on parts of the sewer network and we have teams out doing everything possible to minimise the impact of this extreme rainfall on our network."

In north Wales, fire crews attended reports of flooding at two homes, in Caernarfon and Bangor.

The River Conwy at Llanrwst in Conwy county also burst its banks after heavy rain.